Trimming mechanism for sewing machines



W. E. RAYNOH.

Tmmmmfi MECHANISM FOR SEWING MACMNES.

APPUCATION FILED JULYII, I918.

Patented Sept. 12, 1922.

3 SHEETSSHEET 2 W. E. HAYNOR.

TRKMMING MECHANISM FOR SEWING MACHINES. APPLICATION mu) IULYII. I918.

Patented Sept. 12, 1922.

a SHEETSSHEET 3 A 2 {6 I3 14 O Patented Sept. 1 2, 1922 L it To all iohomit may concern? 'Beit lmowuthat I, WILLIAM E. RAYNQR,

weiti'zen-of the United States, 'residing zit -& Yorlghavo inventeti eerba'rn new' and usef il Improvements in= Trimming Mechanisms for u ameliorating toggle 'blac'les or members open-f ating to sever the Material by abrasion.

win who-patent to Burand No. 698 912, granted-li id Q9, 1902 atoggle trimmigg' mechanism of the above type is shown a l described imd' these toggle trinnriinghers ate so arranged as to swing together dwniiig when trimming actlon and the togglas are opemted' by the movements of the iwd roeke'r: 'liecessarily all adjustments in mi theistroke'oilthe fed brihg ab'out sco espending adjustment in "the stroke)? the togglevmembers- Where tho toggle mun: bars hm cokmacu'dhy d projecting tooth eer riofli by one memitiiir amt-meshing" or mi-ngiig- N1 'mg int-recess inwtheiopposite toggle mam; her, ifi the smoke of "the toggle nembe-is is relatively long, chem is a great-deal o wear or-poundimg oifi the-parts 1 im'ebjwt; ti -the pvesent/ inwenti'on'is to tafi pwoiw'zdemekms wrwrthy'togghe members of time: clmractexz disclosettirnthwDuraind patan my be opeuat eii frdm tihe 'fieedi-ng-mech} anism and; iai timin =t:bereWitli,-bnt wherein the stroke ofixhe toggle members m be Q varied inde'pendemly of the stroke 0 the feed dog, soi that the range of movement of gin: membersmay be adjusted so as tnprewent resulting noise aincl wear incident tb the striking of the parts: one against the i 06161;

in: the drawings which simow hzewa y of illustration one embodiment of t inven- Ei'gme l is a vertical sectional View show- .50 img :1 pmllflll of? ai sewing machine having my impnovements embodied therein, the work and the feed dog being indi called in: diotted so as to clearly show their relation to the trimming members and the means for operating the saline;

Y. fiex ii m'fiiql is- NEWXor-n Assmnonmo vnmnwm it wpmn w ms. 939 313 mm ols A iconnonmm 0E 1nm1m1a.-

ISI EWING mcnmns.

wh n {and July 17, 1913. serial 17. 245,272.

Fig. 2 is a front View of a. pottibti of the forward end of a machine having my improt ements emboc'iied threin- -F1 .;a is a view pz rtly in ith and partly 1n horizontal section showing the trimming mechanism in top plan;

*Fi' 4 is a sectional view on the line 4-4. of Fig.3; Fig. 5 is it dtgil showing the ositionof the toggle trimming members at tKef r ar nd of their stroke when the mags ofmovefiieiit ofthe togglesi's withinP41 fits;

' Fig. '6 is a; similiit view ut'shoWing the the forwiit dend (it their 5 i 7 is a simil'hr new biit sho ngt e togg' 933st the re'ar end 'of their siif'o e when ad usted beyond the 'pro e1; liihit', 'vwlich sults ingreat weatf oti t e gsjfts an Fig. Bis an end' viewsl'iofing the adjust-i able drank for operittirig the feed 'ofckeir'fu In the Merit to Dum reie r to above,a toggle t'rlmniin'giineohanisni is di's closed whic inblildes po o era ting trim mmg mei bers which' opere e to s," er the inseam] abrasion. These flog e trinimm 'ers a rs formed one W t i projecbtgxg tooth engl 'tl'1f e otherjfiith fa 691x6 s11 qingly h iped recess sothat the topt meshi'n or engaging with the fiwsgl I 1 6? mmmen o ne member i-nrpatrted. totfhe :o'iilfe t'. Oheofthe t 1e members is connect ci' a uni: c sh-m a. on the feed rocker,so" flit-11's the feed rocker ose'r'llates' to impart feeeiingflfiiovmiits to the feed dog, the to gfes 'w I begwu gso its to 00-0 crate in t p'seveti'ngpfthe mw teifiai. Te bracket In the Durand paitnt is fixed to the feei rodker' and. it's, result all adjustinents in thethrow'v of the feed rocker which varies the stroke of the feed dog, will likewise vary the stroke of the tog gge trimming memben's. If the throw of t e toggle trimming membetsgis beyond 9 certain" limit; the tooth will be withd'rawn from the eta-operating rebessto such an ex tent as to cause more or fess oi a; striking of the parts when the parts are meshing, resulting in noise am? wear of the parts. The present invention is directed to an arrangement whereby the toggle trinnnin members may be operated from the feeg rocker and whereby the feed rocker may be adjusted for any desired stroke of the feed (log and at the same time the throw of the toggle trimming members may be adj-ester H0 to les at 55 snmingthat tlie feed rocker has a fixed rocker hi hi 1 1,428,980 It. 1;? [iii $13135: ii-t-iiusaisfi so as to be within roperlimits to avoid member li telggre g t t,o the this lessens-ssh e i fi giwh i n h ss i sh h dent toith'e striking 'of theparts one on the the iabric is moved. n igure 5 of the other. I drawings I haveshown the trimmin urem- 5 .IlKeferring mor hiidetsiitothe drirwings, wees-emetrezti ends 70 I haveishownanyini'ention ls -embodiedin the "trimming hostes es hating-h the a trimming mechanism applied to a sewi n manimu m throvy ther In Figure 6 I machine having a needlebar 1; carrying a h'ate'shdwn thes'e' tr iinnling members at the needle 2. Co-operating with t e needle is forward end of ttheir stroke. If the trima looper The material is fe across the ming members be moved rearwardl to a 75 Work support by a feed dog 4. This feed greater extent than that showninkigure dog is arried by a feed barb. The feed 5, the result indicated in Jgne? isbrought bar is pivotd at 6 to aieed roeker 7, which about. this figuretit-willheinoted that in tur n is pivoted at an) thebed 9 of. the the .tooth is withdnawnflfrom tlm recess 15 ma'chihe. The feed her is raised and low- 21h) such anextentthzlt the outerisurface' so e'r'eidby'ah eccent'ric 10 on the main shaft ll. of thetooth is .out of oont'aot with: the rear,

' he feed rocker is vibrated back and forth wall of the recess. i w i" y an'nrm I2whic'h is made as a part of Under these conditions, asthei-toggle trim: the roeker and this arm is conneoted by a ming members move back andlforth there Liiiltl3to acrankMon the end of the main is more or lessofi astrikiugq of .the pairts s5= Shtift. Th s n' iS C rri d by a disc 1 one against the other, resulting.ini noiseand aih'dlis' 31 3 o rad a t dj ne t ross aniundues wear f ipar suonneeohaoth r e, is iid i fi QIt QW i; h Cr m d 1 pr sur otfiupperitoggleiwhileun er liegwfarid; which results in 'var .ing th toggle. is being driven,;thu's causingeii'rela throw of the fe'ed rookeli, It Wll thus :be tive sliding action untiltlost motionihasheem 9o. S h fih roke f he, eed d g ay be taken up. It is thisieslidi-ngi actionivwhiehre'adily v'aried by shif ing he ,posi ion O causes theupper toggle to groove theunth' c'riinli: 14 onthe disc 15. I der toggle and thereby nenderiitheilatter;

'I he trimmin mechanism includes two 1 g 11': j P E triiniyn'ing 'menrbers l fi'and l'i and the mem-. In this type of meohine iti is oftendesir 95.: her tflis p voted a 1 8 to a su a k able toadjust theifeedidogiso iasito have! a whil the membei lf i-s pivot d t '1 to his relativel Ion .feed stroke. It hasibeen seine bi'hdfifih'; Th hhh m u g foundt atrwien the toggle; members are thete't gg i h he f t y fl .1 84 t h operated from a pointijof oonneotion-iwith slipwnin t e pat t eigned o; T enu; the reed rocker, that the mexizmumwthmwi 1:00

be'rilfi lfsflp l'bylgei with & p QJeqtmg mot ofthe feed dog results in; suohalgreet throw- 20 whichis adap to ,engage or mesh h of the toggle members: as to 'causmunmeshf 3hfflih h Ith he hlh Ihh ingandstrikingof:the/partsend'resulting; member is plgqtx'glly ooufieq ed t 22 P noiseand weerthemtm- Whenithenfeed dogi allinli Qsffixed t a p is adjusted :for anextreme feed-stroke-as- I06 4 1 9 1 d h; P 1 24 JJ UITI H above noted, the braoket 26 isJoWered so in a=h e 1 t hek nhe g a e o t e that the relative StI'0k-0=.bh& toggle/trim o her s formed a S i for ming members will beslightlyless.andiwell b tci ergg, fl eg ef 'r sker s; a s ed within the iimitsiindicaited inFi u res Mind 4&5) wfvitl i yegtl alsl ot Q8, gThere s e p e 29 6of therdmwing i-On thesothe and, when no pesehs hwugh ,e rve h slot Into t the feeding meohainism is adjusted-1S0: that i? he} By f fih f gi, th PE h the stroke ofthe feed dog ismlativelyshort, bta' l t QSfIiagfibB r lsed {m l w redn e then the bracket 26 may beiraised so as to d y- It Wi hh fi d th t h l bracket increase the throw of the toggle trimming so G raised h 12 P 24 1S moved members tosuch an extent asto bring about 11:5 9 he PW 8 0f the feed efiioient trimming of the material. It will rocker an Q t Q l? h d B the readily be seen from-the above that 1 have bracket 18 lowered, -thentlII'S pivo P 94 provided a mechanism for operating the brought nearer 'to the pivot point 8. Ast l t i i b r fr th f d;

ncludes features for varying 120 hhF h l i fl 0f the b a 2 the stroke of the toggle trimming members upwardly w ll IDCIGELSG the throw of the pm So th ffi i t t i i or i th 24 ian d the adjustmentof the bracket 6 fabric may be accomplished for all varidownwardly will decrease the throw of the ati i th troke of the feed do and pin 24 relative to this fixed throw of the feed without any poundingof the parts one on 1275 rocker. I the other with resultin wear and noise.

The position of the pin 24 is always It is obvious that minor changes in the deslightly, above the pivot point 6, at which tails of construction ma be made without the feed bar is oonnected to the feed rocker, departing from the spirit of the invention,

so that the throw of the toggle trimming as set forth in the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure b Letters Patent, is

1. I he combination of a feeding mechanism including a feed dog, a feed bar supporting said feed dog, a feed rocker to which said feed bar is attached, means for vibrating said feed rocker, means for varying the throw of the feed rocker and a trimming mechanism including toggle trimming memhere, one of which is provided with a tooth engaging or meshing with a recess in the other toggle trimming member, a bracket adjustably connected to the feed rocker whereby it may be moved toward and from the pivot of the feed rocker and a link connecting said bracket with one of said toggle trimming members.

2. The combination of a feeding mechanism including a feed dog, a feed bar supporting the same, a pivoted feed rocker to which said feed bar is connected, means for vibrating the feed rocker, means whereby the throw of the feed rocker may be varied and a trimming mechanism including toggle trimmin members, one of which is provided with a tooth, the other with a recess with which said tooth meshes, the inner face of said feed rocker having a seat formed thereon provided with vertical slots, a bracket mounted on said seat, screws passing through the slots into the bracket, whereby the same is adjustably secured to the feed rocker, so that the bracket may be moved toward and from the pivot of the feed rocker, the upper end of said bracket being above the feed bar connection to the feed rocker and a link connected to the upper end of the bracket and to one of the toggle trimming members.

In testimony whereof, I affix my signature in the presence of two Witnesses.

\VILLIAM ERASTUS RAYNOR.

Witnesses Jos. BERGER, \VALTER E. OToonn. 

